| Budget Amount *help |
¥28,990,000 (Direct Cost: ¥22,300,000、Indirect Cost: ¥6,690,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2013: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2012: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
Fiscal Year 2011: ¥16,510,000 (Direct Cost: ¥12,700,000、Indirect Cost: ¥3,810,000)
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| Outline of Final Research Achievements |
The presence of icy mantles on interstellar dust grains plays a key role in the formation of molecules in the interstellar medium. To reveal the details of the elementary processes in photochemical reaction on icy grain surface, a instrument to measure translational and ro-vibrational energy of gaseous products formed by photolysis of ices at low temperatures below 10 K was developed. The 157 nm photodissociation of neat H2O, CO2, CO, CH3OH ice or these molecules adsorbed on water ice was investigated by analyzing the time-of-flight (TOF) mass spectra of photofragments such as H, OH, CO, etc by resonance-enhanced multiphoton ionization techniques. IR reflection absorption spectroscopy (IRAS) was utilized for characterization of water ice structures as well as for analysis of adsorbates and products on the ice surface. Photochemical processes on icy grain surface were successfully studied from a surface reaction dynamics’ point of view.
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